At www.sciencedaily.com/releases/2013/08/130812154225.htm … Neanderthals again found to be not so backward. Four bone tools found at Pech de l'Aze were used to work hides. Modern leather workers still use similar tools – but these date 50,000 years ago. Bone tools have often been associated with Neanderthals in the past but the association has been denied as the deposits, usually found above the Neanderthal layers, has led to the accusation that the tools really belong to modern humans and have somehow penetrated into the lower Neanderthal levels. A bit of a cop out, but that is the way it works when one group of people don't like something found by another group.